<script setup>
import { ref, onMounted } from 'vue'
import { getCategoryFilterAPI, getSubCategoryAPI } from '@/apis/category'
import { useRoute } from 'vue-router'
import GoodsItem from '@/components/GoodsItem.vue';

// 1. 获取二级分类列表数据
const route = useRoute()
const categoryFilter = ref({})
const getCategoryFilter = async () => {
  const res = await getCategoryFilterAPI(route.params.id)
  // console.log(res)
  categoryFilter.value = res.result
}
onMounted(() => getCategoryFilter())


// 2. 获取二级分类的商品数据
const goodList = ref([])
const data = ref({
  categoryId: route.params.id,
  page: 1,
  pageSize: 20,
  sortField: 'publishTime' // 'publishTime' 最新商品 | 'orderNum' 最高人气 | 'evaluateNum' 评论最多
})
const getSubCategory = async () => {
  const res = await getSubCategoryAPI(data.value)
  goodList.value = res.result.items
}
onMounted(() => getSubCategory())

// 3. 点击选项卡
const tabChange = () => {
  // console.log(data.value.sortField)
  // 让页码重置到第一页
  data.value.page = 1
  // 重新获取商品列表数据
  getSubCategory()
}


// 4. 滚动触底了
const disabled = ref(false)
const load = async () => {
  console.log('来了');
  // 4.1 让页码++, 重新请求数据
  data.value.page++
  const res = await getSubCategoryAPI(data.value)
  // 让 老数据数组 和 新数据数组 合成一个新的数组并赋值
  goodList.value = [...goodList.value, ...res.result.items]

  // 4.2 判断是否已经全局加载完列表数据
  if (res.result.items.length === 0) {

    disabled.value = true
  }
}
</script>

<template>
  <div class="container ">
    <!-- 面包屑 -->
    <div class="bread-container">
      <el-breadcrumb separator=">">
        <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item :to="{ path: `/category/${categoryFilter.parentId}` }">{{ categoryFilter.parentName }}
        </el-breadcrumb-item>
        <el-breadcrumb-item>{{ categoryFilter.name }}</el-breadcrumb-item>
      </el-breadcrumb>
    </div>
    <div class="sub-container">
      <el-tabs v-model="data.sortField" @tab-change="tabChange">
        <el-tab-pane label="最新商品" name="publishTime"></el-tab-pane>
        <el-tab-pane label="最高人气" name="orderNum"></el-tab-pane>
        <el-tab-pane label="评论最多" name="evaluateNum"></el-tab-pane>
      </el-tabs>
      <div class="body" v-infinite-scroll="load" :infinite-scroll-disabled="disabled">
        <!-- 商品列表-->
        <GoodsItem v-for="item in goodList" :key="item.id" :good="item" />
      </div>
    </div>
  </div>
</template>



<style lang="scss" scoped>
.bread-container {
  padding: 25px 0;
  color: #666;
}

.sub-container {
  padding: 20px 10px;
  background-color: #fff;

  .body {
    display: flex;
    flex-wrap: wrap;
    padding: 0 10px;
  }

  .goods-item {
    display: block;
    width: 220px;
    margin-right: 20px;
    padding: 20px 30px;
    text-align: center;

    img {
      width: 160px;
      height: 160px;
    }

    p {
      padding-top: 10px;
    }

    .name {
      font-size: 16px;
    }

    .desc {
      color: #999;
      height: 29px;
    }

    .price {
      color: $priceColor;
      font-size: 20px;
    }
  }

  .pagination-container {
    margin-top: 20px;
    display: flex;
    justify-content: center;
  }


}
</style>